Summary for week of 8/6-8/12

Julie Whitmore (jaws@fnpxsr)
Fri, 13 Aug 1999 16:37:22 CDT

Summary of E832 Week 9: Aug 6 - Aug 12 Runs: 14125-14206

Hours of beam used/delivered : 73.13 / 96.7 = 75.6%

Vac00 (week) : 343K @ 6.8E12

Vac00 (99run) : 2.52 million

Comments:
Most beam loss due to 1 day accelerator shutdown; some low
intensity (4E12) running due to TeV RF problems.

KTEV used only 75.6% of the available beam (a new KTEV99 record).
KTEV loss due mainly to DAQ related problems
(dart_fresh_start/RC init problems; bad tape;
DC2 plane 4 resets), VV' readout problem, series of
CsI HV divider deaths (4 from channel 1137 alone),
CsI HV database problems, keytree problem.

hours of beam:
Shift used/delivered comment
---------------------------------------------------------------------
Fri Aug 6 OWL: 6.25/7.0 DDD veto problem (DC2 plane 4 reseat)
DAY: 5.0/5.6 Lots of ktevana errors
EVE: 6.5/6.5* Intermittent beam w/ lots of aborts.

Sat Aug 7 OWL: 5.5/6.0* Crate 53 problems; Lots of aborts.
DAY: 3.5/4.5* plane 4 DC2 problem;Lots of aborts.
EVE: 7.75/8.0 Smooth data taking.

Sun Aug 8 OWL: 1.5/7.0 CsI HV divider swap fest.
DAY: 2.25/7.5* More CsI divider swapping; keytree problem.
EVE: 1.5/6.0* Divider swap continues; crate 51 fix.

Mon Aug 9 OWL: 3.0/3.0* TeV problems: 1 turn only available (4E12)
DAY: 3.5/3.5* Low intensity (4E12); RF problems
EVE: 7.65/8.0 Beam stop closes spontaneously.

Tue Aug 10 OWL: 4.4/4.4 Smooth data taking until TeV shutdown.
DAY 0.0/0.0 Accelerator down.
EVE: 0.0/0.0 Accelerator down.

Wed Aug 11 OWL: 0.0/0.0 Accelerator down.
DAY: 0.0/0.0 Accelerator down.
EVE: 2.0/2.5 Accelerator startup.

Thu Aug 12 OWL: 5.83/7.0 DDD veto problems. (DC2 plane 4 power cycle).
DAY: 5.0/6.2 CsI HV problems. Monitor plane problem.
EVE: 2.0/4.0 CsI HV problems. CsI channel 1137 fix.
---------------------------------------------------------------------

* Beam intermittent w/ lots of aborts; Beam delivered time is modified
to reflect the losses.